code: def __init__(self, axis):
      self.axis = axis
  
file_path: chainer/chainer/functions/activation/softmax.py
imports: import chainer
  from chainer import backend
  from chainer.backends import cuda
  from chainer import function_node
  import chainer.functions
  from chainer.utils import type_check
label_desc: Use image node_id 1 to create a new _SoftmaxGrad object from inherited base classes: function_node with example: obj = _SoftmaxGrad(axis)